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Transparent hydroxyapatite ceramics with nanograin structure prepared by high pressure spark plasma sintering at the minimized sintering temperature
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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2011 (English)In: Journal of the European Ceramic Society, ISSN 0955-2219, E-ISSN 1873-619X, Vol. 31, no 9, 1533-1540 p.Article in journal (Refereed) Published
Abstract [en]

A hydrothermally processed bulky powder composed of loosely aggregated nano-sized rods was consolidated by spark plasma sintering. The use of a high pressure cell allows the application of pressure up to 500 MPa. It was found that applying of high pressure is beneficial for widening up the kinetic window for attaining dense HAp nanoceramics. The high transparency of HAp nanoceramics obtained in this study is ascribed to the high density and homogeneous nano-grained structure achieved besides the unique intrinsic optical properties of the HAp crystal itself, i.e. its low refractive index and very small birefringence. Achieving full densification at the minimized sintering temperature allows for the first time the preparation of transparent HAp nanoceramics with stoichiometric composition, i.e. avoiding the loss of structural water that commonly takes place during the conventional ways of sintering.

Place, publisher, year, edition, pages
2011. Vol. 31, no 9, 1533-1540 p.
Keyword [en]
Hydroxyapatite, Ceramic structure, Microstructure, Nanoparticle, Sintering
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:su:diva-69266DOI: 10.1016/j.jeurceramsoc.2011.03.021ISI: 000291143400002OAI: oai:DiVA.org:su-69266DiVA: diva2:476122
Note
authorCount :6Available from: 2012-01-11 Created: 2012-01-11 Last updated: 2017-12-08Bibliographically approved

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Eriksson, MirvaLiu, YiNygren, MatsShen, Zhijian James
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